Great Northern Minerals has launched a diamond drilling campaign at Big Rush, expected to take 10 days to complete.
It comes after the company recently flagged potential for a significant gold system at the project, south of Greenvale in North Queensland.
The initial diamond drilling is focused underneath the central pit area of the historical gold mine, where previous RC drilling returned results including 4m at 20.73g/t gold (including 1m at 81.88 g/t gold).
Anomalous gold mineralisation at Big Rush is now documented to occur over at least 1km of strike, with additional strike extension apparent.
As a result of the drilling campaign completed and in progress, the company anticipates a resource estimate to be released during the first quarter of 2021.
In an update on the current campaign, Great Northern said said four RC precollars had been drilled to an average depth of 180m and HQ diamond core drilling had commenced.
Assay results are due in the December quarter, following structural logging and sampling.
The company has also been investigating a Big Rush heap leach pad.
A large (100 kg) representative sample has been collected for metallurgical testwork to initially determine if screening and sizing has the potential to upgrade the material to a higher grade than insitu and to determine any leaching characteristics.